Tachilek's climate is characterized by a gradual warming trend from February to May, with temperatures steadily increasing from an average of 22°C in February to 28°C in May. The warmest period occurs between April and August, with temperatures rarely dipping below 25°C or rising above 37°C. June, July, and August are essentially identical in terms of temperature, suggesting a stable plateau during these months. September marks the beginning of a gentle decline in temperature, which continues through November before returning to cooler conditions by December. The overall pattern reveals two distinct seasons: a warm season from February to May, followed by a relatively cool period from June to January.